@article{AFM_2012_37_1_a23,
     author = {Zair Ibragimov},
     title = {M\"obius maps between ultrametric spaces are local similarities},
     journal = {Annales Fennici Mathematici},
     pages = {309--317},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {2012},
     doi = {10.5186/aasfm.2012.3725},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2012.3725/}
}